It is a System Haenel Model 1909 Schonzeitbüchse made in 1912 by proof mark. Chambered in 25/35 rimless as Haenel called it or .25 Remington as we know it, aka 6.5x52. DST, octagon to round barrel and 4x scope (Schmit&Bender I've been told) was added circa late '60s. I've seen picture of only one other owned by a fellow in Norway.
